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The product of n, nth roots of unity is (1) 1 (2) – 1 (3) (-1)^n-1 (4) (-1)^n

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The product of n, nth roots of unity is

(1) 1 

(2) – 1

(3) (-1)n-1

(4) (-1)n

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Correct Option (3) (-1)n-1

Explanation: 

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